Monero [1]: Completely annonymous yet secure currency
Truebit [2]: Decentralized verifiable computation
Oasis [3]: Decentralized, fast and cheap transactions with annonymous smart contracts
Marlin [4]: Infraestructure to speed up any blockchain
[1] https://www.getmonero.org [2] https://truebit.io [3] https://oasisprotocol.org [4] https://www.marlin.org/